Update! I tried to disable "H264/HEVC hardware accelerated decoding" and "H264/HEVC hardware accelerated encoding" in Prefecences > Media. After that I created a new project and then imported sequence from my old project file and it worked!

For sure this ain't long-term solution, but helped me to finish my project so I was able to deliver final version to my client.

Hi!

Still having the same problem with Fuji 6.2K HEVC 4:2:2 10bit. In the last message I wrote that I have a old project that works fine, but now even that doesn't work and Premiere Pro crashes when I try to open it. When using 4:2:0 everything works just fine with both LongGop and All-I.

I'm running latest versions of both Premiere Pro, Nvidia Studio Driver and Windows 11.

Adobe: Have you figured out any solution for this and is there a fix coming in Premiere Pro 26.0??

I am having this SAME issue and I have to keep rolling back to old versions of premiere to get certain projects to load and to work at all, I also cant export without error codes using both Hardward AND Software encoding options. 

As I said, it's really frustrating. I upgraded my graphics card to an RTX 5070Ti because of the new H265-422-10 Bit-supported Encoder-Decoders that come with the Nvidia RTX 5000 series, but now I can't use their Decoders in Premiere 🙂

Hi! I tried to create a new project > Created 4K sequence> Then added 6.2K 4:2:0 footage > Dragged footage in to the sequence and "Fit to frame" = No problems. Then I imported 6.2K 4:2:2 footage and dragged it in to my 4K sequence = Playback doesn't work and Program Monitor freezes, and when I try to close Premiere Pro it doesn't respond and I have to force close it. Very frustrating!

But still the project I created in September with older version of Premiere works just fine with almost 200 clips of 6.2K 4:2:2 footage. It's like new projects that I create with 25.5. are broken at first place.

I'm totally fine using 4:2:0 LongGOP but still it would be great to hear what is causing these problems. I usually delivery both horizontal and vertical video for my customers, so 6.2K 3:2 footage suit my needs very well.

Hello, yes, I'm experiencing the same issues you mentioned. I noticed something: if I import H265-422-10 Bit 4K files and H265-422-10 Bit 6.2K files into Premiere Pro at the same time, it crashes. If I import only 4K or only 6.2K files, it doesn't crash. You can try it too 🙂 This situation is really frustrating. I'm not a software engineer, but I think this problem stems from the fact that 6.2K videos can't use the graphics card's decoders. I think Adobe could easily fix this issue with an update. I hope they do, because working with these files without using the graphics card's decoders seems practically impossible...

Hi!

I'm having same kind of problem with Fujifilm F-log2 4:2:2 6.2K LongGOP footage. When I make a new project and try to import files Premiere Pro crashes right away or after few minutes. I have a project created in September with same 4:2:2 footage and it works just fine (tried it today). So the problem occures when creating a new project. I also tried same resolution but with 4:2:0 and had no issues. I haven't tried 4K or All-I yet.

I have Nvidia RTX 5080 with latest Studio Driver (581.57) & Premiere Pro 25.5

//Pasi

As I mentioned, I'm only experiencing this issue with H265-422-10 Bit 6.2K files. For these files, encoding works with my Nvidia RTX 5070Ti graphics card, but when working in the timeline, the decoders aren't functioning, and the decoding process is handled by the CPU. This results in significant performance loss. There are no issues with 4K files that have the exact same specifications. I would like to send you a link containing two of the H265-422-10 Bit 6.2K files I'm having problems with, but for some reason I can't send a private message. If you'd like, you can message me first and I'll send you the link with the sample files?